Optotransistor
光晶体管
🗣️ 情景例句
You should use 'officer' to address a policeman.
你应该用 'officer' 来称呼警察。
He who fears to suffer, suffers from fear.
怕吃苦头的反因怕而吃苦头。
There are plenty of interesting places to visit.
那儿有很多游览胜地。